- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Solution-shearing-processed flexible polymer solar mini sub-modules fabricated on an embedded silver-grid substrate
摘要： A flexible transparent electrode film is fabricated by coating the conductive polymer PEDOT:PSS using a solution-shearing process on PET film in which silver nanoparticles are embedded in intaglio grids patterned by a roll-to-roll thermal imprinting method. The composite electrode shows a sheet resistance of 20 Ω square?1 and a light transmittance of 82.9% at room temperature. An all-solution polymer solar mini sub-module is fabricated on the flexible electrode by further depositing ZnO and P3HT:PC61BM layers using the optimized solution-shearing process with subsequent printing of PEDOT:PSS and flat-screen printing of silver. The structure and morphology of the solution-shearing processed films examined by XRD and AFM show smoother surfaces and higher crystallinity than those of conventional spin-coated films. The solution-shearing-processed flexible polymer solar mini sub-module fabricated on an area of 36 cm2 shows a power conversion efficiency of 1.87% under an AM 1.5G solar simulator. Therefore, the solution-shearing process toward large-area flexible polymer solar module fabrication is successfully demonstrated.
关键词： Solution-shearing coating,Solar mini sub-module,Flexible transparent substrate,Large-area process
更新于2025-09-19 17:15:36
-
Comment on “Improving Light Outcoupling Efficiency for OLEDs with Microlens Array Fabricated on Transparent Substrate”
摘要： The recently published research article, titled “Improving Light Outcoupling Efficiency for OLEDs with Microlens Array Fabricated on Transparent Substrate,” provides a significant design rule for the high extraction efficiency of OLED devices. According to the simulation results, the authors proposed that a well-organized microlens-embedding structure may increase 80% light output efficiency. For an experimental demonstration, about 30% luminance enhancement was induced by a microlens-arrayed substrate. The optical lens design was applied and revealed a noticeable improvement of OLED performances. The authors demonstrated the improved OLED performances by using geometric designs of microlens arrays, which are formed on a glass substrate. The microlens arrays were formed by photoresist material. The photoresist film showed high transmittance above 90% for longer wavelengths (λ>500 nm); however, the photoresist microlens arrays have no electrical advantages for carrier transportation. Meanwhile, we also consider an electrical aspect for further significant enhancement for photoelectric devices, including LEDs and solar cells. A distinctive feature between LEDs and solar cells is a way to utilize energy conversion. LEDs convert the electric energy to light emission and solar cells generate electric power from the incident photon energy. This basic and important understanding may provide mutual applications of photoelectric devices. Previously, we have investigated an indium-tin-oxide (ITO) transparent conducting layer to focus the incident light into the light-reactive semiconducting material. The nanoscale ITO nanodome arrays efficiently focus the incoming light resulting in the enhanced solar cell performances, based on the enlarged current value. This was caused by the optical design to manipulate the light penetration through the Si material. Additionally, the electrical aspect also contributed to increase in current value due to excellent electrical conductivity of the ITO layer, providing an efficient route to collect photogenerated carriers, effectively. This optically and electrically balanced design may be applied in the microlens-arrayed OLED devices. Instead of using the electrically nonconductive material, electrically conductive materials, such as ITO, can be considered for the light-modulating structure. This design would spontaneously provide the electrical advantages and maintain the optical benefit of light manipulation of the patterned structure. To realize these optical and electrical features, one may think of the patterned ITO arrays, which sit on the ITO anode layer. The carriers from organic (light-active) layers can easily reach the ITO anode and the emitted light can efficiently propagate through the patterned ITO arrays. Figure 1 is one of the possible schemes of the functional ITO patterns for efficient OLED. Double anode layers are proposed, where the film ITO is a conventional anode figure and the patterned ITO-array structure is for the functional light extraction. Besides the light management from the patterned ITO-array structure, the electrical conductivity would be enhanced according to double ITO layers.
关键词： OLED,transparent substrate,microlens array,ITO,light outcoupling efficiency,photoelectric devices
更新于2025-09-16 10:30:52
-
[IEEE 2019 6th International Conference on Space Science and Communication (IconSpace) - Johor Bahru, Malaysia (2019.7.28-2019.7.30)] 2019 6th International Conference on Space Science and Communication (IconSpace) - Koch Fractal Loop Circular Polarization (CP) Antenna Integrated with Solar Cells
摘要： Minimal profile antennas for wireless devices which characteristics consisted of being low cost, highly reliable, and lightweight, it bears a new challenge for the design of the antenna in wireless communications. In this paper, we propose a design of circularly polarized microstrip patch antenna integration with solar cells for green wireless applications. Two techniques have been proposed to form the prototype between the communication system (design of antenna) and solar panel (solar cell). Both methods will face two issues generally; the solar system needs to get 100% sunlight and the magnetic field produced by radio communication systems as well as the electric field produced by solar cells should not affect the efficiency. The antenna is composed of a Koch fractal loop patch and the substrate is employed using a transparent material. This enables the light to pass through with high efficiency to illuminate the solar panel cells while the RF performance is maintained with minimal degradation. The communication frequency measures 2.6, 3.5 and 4.4 GHz. CST MWS simulation is also studied and compared among the different substrates which show different results based on the same parameters, which is implemented with a lattice of 2×2 square solar cells. With this arrangement, the solar cells will be able to obtain 100% of sunlight exposure. The characteristics of the broadband are achieved by combining resonances and the minimum axial ratio points created by the driven patch and solar cell surface.
关键词： Trade-off RF transparency,Wireless communication,transparent substrate,Microstrip patch antenna,Compact Meshed patch antenna,integration antenna and solar panel,CST MWS,performances and Frequency,Gain
更新于2025-09-12 10:27:22
-
Methodology and fabrication of adherent and crack-free SU-8 photoresist-derived carbon MEMS on fused silica transparent substrates
摘要： We present a methodology for the fabrication of photopatterned carbon films based on SU-8 deposited on transparent fused silica substrates. Specifically, we developed and implemented this methodology for carbon microstructure fabrication derived from SU-8 2035 and SU-8 3035. It was found that SU-8 3035 derived carbon microstructures were crack free and adhered well to the substrate, while SU-8 2035 resulted in fractured and detached carbon microstructures. In addition, we characterized the produced SU-8 3035 derived carbon by measuring its electrical resistivity (1.412 ± 0.011 m? m), inter-structure electrical resistance, contact angle (35.7° ± 6.0°), Raman spectrum and adhesion strength to the substrate. In brief, even though SU-8 2035 and SU-8 3035 are useful materials for C-MEMS fabrication, we found that SU-8 3035 is more suitable for the fabrication of crack free and adherent carbon microstructures on transparent fused silica substrates.
关键词： Micro-structure,C-MEMS,SU-8,Carbon,Pyrolysis,Transparent substrate
更新于2025-09-09 09:28:46